Near wakeの渦の拡散と空気抵抗の軽減

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タイトル別名
  • Diffusion of Vortices in Near Wake and Reduction of Aerodynamic Drag
  • Near wake ノ ウズ ノ カクサン ト クウキ テイコウ ノ ケイゲン

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説明

This paper describes the experimental study on the relation between aerodynamic drag and vorticities in incompressible flow. Diffusion of vorticities of shedding vortices in three-dimensionalized wakes behind tapered cylinders and a thick plate with a serrated trailing edge was investigated and discussed in relation to the mechanism leading to the base drag reduction. These results are not contradictory to the analytical concept obtained by the energy integral of NAVIER-STOKES equation, which suggests to minimize the volume integral of the square of vorticities in order to reduce the total drag.

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